<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        <el-breadcrumb>

         <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <el-table :data="roleslist" border stripe>
                <!-- 展示列-->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag @close="removeRightById(scope.row,item1.id)">
                                    {{ite1.authName}}
                                </el-tag><i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级权限 -->
                            <el-col :span="19">
                                <el-row :class="[i2 == 0 ? '' :'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag><i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="rolesName"></el-table-column>
                <el-table-column label="角色描述" prop="rolesDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" size="mini" icon="el-icon-edit">编辑</el-button>
                        <el-button type="danger" size="mini" icon="el-icon-delete">删除</el-button>
                        <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>   

        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" default-expand-all show-checkbox node-key="id" default-checked-keys="defKeys" ref="treeRef">

            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取消</el-button>
                <el-button type="primary" @click="allotRights">确定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return {
            //所有角色列表数据 
            roleslist:[],
            setRightDialogVisible:false,
            //权限列表
            rightslist:[],
            treeProps:{
                children:'children',
                label:'authName'
            },
            //默认选中的节点
            defKeys:[],
            roleId:''

        }
    },
    created(){
        this.getRolesList();
    },
    methods: {
        //获取所有角色列表
        async getRolesList() {
            const {data:res} = await this.$http.get('roles');
            if(res.meta.code != '200'){
                return this.$message.error('获取数据列表失败')
            }
            this.roleslist = res.data;
            console.log(this.roleslist);
        },
        async removeRightById(role,rightId){
            //弹框提示用户是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除角色，是否继续?','提示',{
                confirmButtonText:'确定',
                cancelButtonText:'取消',
                type:'warning'
            })
            if(confirmResult != 'confirm'){
                return this.$message.info('用户取消了删除')
            }

           const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
           if(res.meta.code != '200'){
               return this.$$message.error('删除权限失败');
           }

            role.children = res.data;
        },
        async showSetRightDialog(role){
            this.roleId = role.id;
            const {data:res} = this.$http.get('rights/tree');
            if(res.meta.code != '200'){
                return this.$message.error('获取权限树失败')
            }
            this.rightslist = res.data;
            //递归获取三级节点的id
            this.getLeafKeys(role, this.defKeys)
            this.setRightDialogVisible = true;

        },
        //通过递归的形式，获取角色下所有三级权限的id,并保存到 defKeys数组中
        getLeafKeys(node,arr){
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>{
                this.getLeafKeys(item,arr);
            })
        },
        //监听分配权限
        setRightDialogClosed(){
            this.defKeys = [];
        },
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.ggetCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ];

            const idStr = keys.join(',');
            const {data:res} = await this.$http.post(`roles/${roleId}/rights`,{rids:idStr})
            if(res.meta.code != '200'){
                return this.$message.error('分配权限 失败')
            }
            this.$message.error('分配权限成功')
            this.getRolesList();
            this.setRightDialogVisible = false;
        }
    },
    
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>